Here are some threads...
The first one has a pick of the linkage spring for a 2.3 I believe. The second one has a pick of a 300E. Hope this helps...

throttle cable adjustment

http://www.peachparts.com/shopforum/attachments/tech-help/18977d1086549453-300e-throttle-linkage-return-spring-location-124-throttle-linkage-spring-small-.jpg